Hi guys I just got my hands on two Cheetah T10 SAS (Serial Attached SCSI ) drives and a PCI-e X8 controller (that has a ARM chip how cool is that

).
I've set it up in a RAID 0 configuration and it gives me just a little over 600 Gigabyte of space.
Now to my many big questions?
Both hard drives runs very VERY hot, almost to the degree that touching them hurts, almost. Also I get the feeling that they use a lot of power?
So.. Since I know just about next to nothing, other than its fast, just how fast is this? Is it worth the extra power consumption, and also where and what kind of performance increase should I expect ? Would you if you could run with such a setup?
Right now the entire setup, the two drives and controller is unplugged on my desk. (Got it for free btw)
What should I do with it ?